Radioactive decay is a

$A$ first-order reaction takes $16 \text{ minutes}$ for its $50\%$ completion. What fraction of the reactant would react in $32 \text{ minutes}$ from the beginning?

Which of the following curves represents a first-order reaction?

Which of the following expressions is correct for a first-order reaction? $(CO)$ refers to the initial concentration of the reactant.

If compound $A$ reacts with $B$ following first order kinetics with rate constant $2.011 \times 10^{-3} \ s^{-1}$. The time taken by $A$ (in seconds) to reduce from $7 \ g$ to $2 \ g$ will be $.........$ (Nearest Integer) $[\log 5=0.698, \log 7=0.845, \log 2=0.301]$

Calculate the rate constant of the first order reaction if $80 \%$ of the reactant reacted in $15 \ minute$.